Chemical Communications p. 1659 - 1660 (1996)
Update date:2022-08-29
Topics:
Shimizu, Hiroshi
Yonezawa, Takenori
Watanabe, Tomoko
Kobayashi, Kazuhiro
Deprotonation of 2-alkyl-3-benzoyl-2-thiochromenium salts 1 or 2 with 2 equiv. of triethylamine in ethanol affords the unexpected benzothiopyran derivatives 3 and 4; the structure of 3a is confirmed by X-ray crystallography.
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